I just got the basic multitasking kernel and filesystem working, tomorrow I hope to get a windowing system, and then I will set up the ability to run a program from a file.
Current (and permenent furture problems):
We cannot force an app to stop (apps execute as asynchronous functions in javascript)
Possible future mitigation: Maybe move to lua if possible
We cannot stop an app from doing something bad
Mitigated as well by the earlier mentioned thing